import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
sys.setrecursionlimit(10**7)
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################

n = input()
from collections import Counter
b = [1,1,1,1,1,1]
c = [2,3,4,5,6,7]
a = [0]*8
for i in n:
    a[b[ord(i)-65]]+=1
    a[c[ord(i)-65]]+=1

m = max(a)
ans = []
for i in range(8):
    if a[i]==m:
        ans.append(i)
print(*ans)